Pipe-wrench.



UNITED STATES PATENT OFFICE.

JOHN W. LIND, OF DOROHESTER, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TO JOHNJ. MORRIS, OF BOSTON, MASSACHUSETTS.

PIPE-WRENCH.

Specification of Letters Patent.

Patented Aug. 18, 1908.

Application filed July 17, 1907. Serial No. 384,223.

To all whom it may concern:

Be it known that I, JOHN W. LIND, a citizen of the United States,residing at Dorchester, in the county of Suffolk and State ofMassachusetts, have invented an Improvement in PipeWrenches, of whichthe following description, in connection with the accompanying drawings,is a specification, like letters on the drawings representing likeparts.

In various situations a peculiarly small and yet powerful pipe wrench isdesirable, particularly in connection with automobiles, where themachinery is very compact and usually under a seat or in a confinedspace, difficult to get at.

Accordingly my invention provides a wrench having few movable parts orseparate elements and occupying exceedingly little space, being in factin its smaller sizes not larger than a lead pencil.

In its simplest form-my Wrench consists of a tubular handle internallythreaded to receive at one end a threaded j aw-member and provided witha hook to engage the free end of a web or strap secured at its oppositeend to the outer end of the aw-rnember.

Further constructional detailsand advantages of my invention will appearmore at length in the course of the following description taken withreference to the accompanying drawings, in which I have illustrated apreferred embodiment of the invention.

In the drawings, Figure 1 is a side elevation of the wrench ready toengage with a pipe; Fig. 2 is a central longitudinal section thereof,showing the wrench in operative engagement with a pipe; and Fig. 3 is aplan view thereof partly broken away for clearness of illustration.

I provide a handle member consisting of a simple tube 1 preferablyhaving its outer end 2 knurled to constitute a hand-hold, and providedat its inner end with a hook device, preferably consisting of a ring 3free to turn between shoulders 4 and provided with hooks 5 to engageremovably with the end 6 of a weblike strap member 7, preferably made ofspring steel secured at 8 to the head 9 of a jaw-member. The jaw-memberhas a hardened steel jaw 10 provided with usual teeth 11 for biting intoa pipe 12 or other article which is to be turned by the wrench, said jaw10 being preferably pivoted at 13 in a transverse recess 14 in saidhead. The jaw-member adjacent its head is threaded as indicated at 15and has a length approximately corresponding to the length of the handlemember 1, the stem portion 16 thereof extending into the outerunthreaded portion 17 of the handle for giving strength and bracingeffect.

In use the strap 7 is carried around the pipe 12 and its apertured end 6hooked over one of the hooks 5 of the handle member, whereupon thehandle is rotated over to the left, which results in quickly lengtheningthe Wrench and correspondingly tightening the strap 7. As soon as thestrap 7 and jaw 10 are brought into pinching engagement with the pipethe wrench is ready to turn the pipe. One hook 5 will answer but Iprefer to provide a number of hooks for greater convenience. Also it isunnecessary to provide a separate jaw 10 but the latter is preferable asit enables me to secure better results in operation and also to providea hardened jaw of more expensive material than the carrying member 9.The long length of engaging threaded portions of the handle andcontained jaw-member give great strength of resistance and render thewrench durable. One great advantage of my wrench is that there are nopivoted levers and no cranks or divergently movable parts, but on thecontraryit consists simply of telescoping tubular members having a smallhead and strap. While the strap may be of any material, I prefer that itshould be stifi and spring-like.

I am aware that various changes may be made over the embodiment hereinshown without departing from the spirit and scope of my invention asdefined in the following claims.

Having described my invention, what I claim as new and desire to secureby Letters hook mounted to rotate on the forward end of said handle,said hook being immovable longitudinally thereof, a jaw pivotedintermediate its length at the forward end of 5 said rod, and a flexibleband secured to the forward end of the rod and provided with means fordetachably engaging said hook to form a loop.

In testimony whereof, I have signed my name to th s specification, inthe presence of 10 two subsorlblng witnesses.

JOHN W. LIND.

Witnesses:

GEO. H. MAXWELL, EDWARD MAXWELL.

